https://github.com/swoorup/rust-ecs-comparison
Comparison by example between different rust ecs libraries
https://github.com/swoorup/rust-ecs-comparison
bevy-ecs ecs evenio flax flecs hecs sparsey specs
Last synced: 4 days ago
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Comparison by example between different rust ecs libraries
- Host: GitHub
- URL: https://github.com/swoorup/rust-ecs-comparison
- Owner: Swoorup
- Created: 2025-08-04T14:36:39.000Z (11 months ago)
- Default Branch: main
- Last Pushed: 2025-08-16T13:07:35.000Z (10 months ago)
- Last Synced: 2026-06-13T11:34:06.756Z (14 days ago)
- Topics: bevy-ecs, ecs, evenio, flax, flecs, hecs, sparsey, specs
- Language: Rust
- Homepage:
- Size: 82 KB
- Stars: 0
- Watchers: 0
- Forks: 0
- Open Issues: 0
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Metadata Files:
- Readme: README.md
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README
# ECS Library Comparison Project
A comprehensive comparison of 6 different Entity Component System (ECS) libraries in Rust, demonstrating production-ready patterns with type-safe entity handles and command systems.
## Overview
This project implements the same pane-dataset management system across multiple ECS libraries, each enhanced with production-ready patterns to provide a realistic comparison of real-world usage.
## Featured Libraries
| Library | Approach | Key Features |
|---------|----------|--------------|
| **Flax** | Relations-based | Type-safe handles, modular components, built-in relations, command system |
| **Evenio** | Event-driven | Type-safe handles, command system, registry pattern, event architecture |
| **Hecs + Hierarchy** | Hierarchy-based | Type-safe handles, command system, parent-child relationships |
| **Bevy ECS** | Component-based | Type-safe handles, command system, modern API, wrapper relationships |
| **Sparsey** | Group-based | Type-safe handles, component groups |
| **Flecs** | Limited Rust API | Type-safe handles, simulated command system |
## Running Examples
Each library implementation is available as a separate binary:
```bash
# Run individual examples
cargo run --bin flax_example
cargo run --bin evenio_example
cargo run --bin hecs_example
cargo run --bin bevy_ecs_example
cargo run --bin sparsey_example
cargo run --bin flecs_example
```
## Production Patterns Demonstrated
All examples showcase production-ready patterns:
- **Type-Safe Entity Handles**: Compile-time prevention of entity type mixing
- **Command Systems**: Queue-based deferred execution for safer entity lifecycle management
- **Realistic Data**: Sensor data examples instead of artificial test data
- **Comprehensive Functionality**: Beyond basic component storage and queries
## Detailed Analysis
See [ECS_COMPARISON.md](ECS_COMPARISON.md) for an in-depth analysis of each library including:
- Code examples with production patterns
- Performance characteristics
- Readability and maintainability assessment
- Production-readiness evaluation
- Detailed recommendations for different use cases
## Key Findings
The comparison reveals that **Flax Enhanced** provides the best combination of type safety, semantic relations, modular organization, and zero-cost abstractions, making it the most suitable choice for large-scale production applications.
## Requirements
- Rust 2024 edition
- See `Cargo.toml` for specific dependency versions
## License
This project is for educational and comparison purposes, demonstrating different approaches to ECS architecture in Rust.